391241376 has 36 divisors (see below), whose sum is σ = 1112593482. Its totient is φ = 130413696.

The previous prime is 391241371. The next prime is 391241387. The reversal of 391241376 is 673142193.

It can be written as a sum of positive squares in only one way, i.e., 293231376 + 98010000 = 17124^2 + 9900^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 391241376.

It is not an unprimeable number, because it can be changed into a prime (391241371) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 678951 + ... + 679526.

Almost surely, 2^391241376 is an apocalyptic number.

391241376 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

391241376 is an abundant number, since it is smaller than the sum of its proper divisors (721352106).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

391241376 is a wasteful number, since it uses less digits than its factorization.

391241376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358493 (or 1358482 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 391241376 is about 19779.8224461192. The cubic root of 391241376 is about 731.3887219617.

The spelling of 391241376 in words is "three hundred ninety-one million, two hundred forty-one thousand, three hundred seventy-six".